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A203586 as a simple table

na(n)
113
2500
340426
45709600
51256804900
6399383584000
7173474742285000
898872482630272000
971645799536067250000
1064368175738481971200000
1170249051303937073666500000
1291567621291850074309120000000

[13,500,40426,5709600,1256804900,399383584000,
 173474742285000,98872482630272000,
 71645799536067250000,64368175738481971200000,
 70249051303937073666500000,
 91567621291850074309120000000]